Electronic telephone system



Dec. 2, 1958 R. B. TROU'SDALE ET AL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 I 48 Sheets-Sheet 1 II LS-II LINE SWITCH CIRCUIT FIGS. I7 BI l8 LINE SWITCH CIRCUIT INVENTORS. ROBERT B. TROUSDALE GEORGE ELLIOTT PAUL F. WALZ AGENT Dec. 2, 1958 Filed May 16, 1956 R. B. TROUSDALE ET AL ELECTRONIC TELEPHONE SYSTEM LINK LI MULTIPLE TONESI POINT FIG.|9

-- SCI l 8 TRANSLATOR sea 5C 304' SET 50 FROM SE sls' LINKS 4-l5 INCL. SF

FIG$.|38:I4

0. an (I) J L|NK2 L2 MULTIPLE TONES 2 POINT [6 AL-l AL-2 LINK ALLOTTER AL-4 f TO AL-l5 LINKS 4-15 INGL. FIGS. saw 6 o Q: o J 7- T m Dec. 2, 1958 R. B. TROUSDALE ETAL I 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 48 Sheets-Sheet 3 TONESI FINDER CONNECTOR SCI ' TONE 8:

PULSE GENERATOR AL-l FIGS. 2l-28 INCL.

FIGS. l5 8x20 DIAL TONE "I'ONES 2 FINDER CONNECTOR Dec. 2, 1958 R. B. TROUSDALE ETAL 2,863,001

' ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 4s Sheets-Sheet 5 LINK 3 MULTIPLE POINT RINGING RC CONTROL AMPLIFIER 5p FIG. 34

REGISTER DRIVE PULSE GENERATOR FIG. 34

RDP

I9 BINARY PULSE GENERATOR SAMPLING PULSE GENERATOR FIG. 29

MASTER OSCILLATOR FIG- 29 FIGS. 29 830 Dec. 2, 1958 R. B. TROUSDALE ETAL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 I 48 Sheets-Sheet 6 LINK 3 TONES3 FINDER CONN ECTOR U LLI EXECUTIVE CUT-IN MARKER TRUNK HUNTING MARKER BUSY LEAD CONVERTER 8 EMERGENCY SERVICE CIRCUIT Dec. 2, 1958 R. B. TRbusbALE ET AL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 48 Sheets-Sheet 7 FIG. FIG. FIG.

FIG. FIG. FIG.

FIG. FIG.

FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG, I I l2 l3 l4 l5 '21 22 2a 24 FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. l6 l7 l8 I9 20 25 2s 21 28 FIG. Fl G. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. 29 so 3| 32 as 34 as as 31 as 39 4| FIG.

R; B. TROUSDALE ET AL ELECTRONIC TELEPHONE SYSTEM Dec. 2; 1958,

Filed May 16, 1956 LINK ALLO'IY'TER l6 AL 'S AL-4 AL-5 48 Sheets-Sheet 8 TO FINDER CONNECTOR LINKS 2-!5 Dec. 2, 1958 R. B. TROUSDALE ET AL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 48 Sheets-Sheet 9 LINK ALLOTTER is AL-ll AL-l2 AL-l3 Dec. 2, 1958 R. B. TROUSQDALE ET AL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 C 4s Sheets-Sheet 10 LINE SWITCH CIRCUIT FOR EMERGENCY SERVICE LINE I T T22 EMERGENCY R2 SERVICE P m c RY 22 CIRCUIT 22 FROM FINDER CONNECTOR LINK 2 ESR2 l I l BILATERAL TRANSISTOR CONTROL I STAGES 3-I4 NOT snow I l NY I WY 4a $CI5 i FROM FINDER CONNECTOR LINK l5 ESRIS -34 -45 scI' ESR

Dec. 2, 1958 R; B. TROUSDALE ETAL ELECTRONIC TELEPHONE SYSTEM SWITCH BANK TRANSLATOR l3 A SET Dec; 2, 1958 B. TROUSDALE ETA L 01 ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 I -48 Sheets-Sheet 14 TONE a PULSE GENERATOR 29 SCI ESR l Dec. 2, 1958, R; B. TROUSDALE ETAL 2,363,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 v 4a Sheets-Sheet 16 LINE SWITCH CIRCUIT LS-II SP' Tll Rll SBT

BLS

R. B. TROUSDALE ETAL ELECTRONIC TELEPHONE SYSTEM Dec. 2, 1958 48 Sheets-Sheet 17 Filed May 16, 1956 C R L JV 0 R S L H U c R m s 5 H 2 m I W l 0 l 2 3 l S m L 2 U L B U- U U U U M M m 0 W w m H m 3 M .l 4 a. l a. l l a. 0 L. m j m I 6 7 ng m A A A r C BLS Dec. 2, 1958 R. B. TROUSDALE ET AL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 48 Sheets-Sheet 18 LINK l MULTIPLE POlNTl4-l LINK2 MULTIPLE POINT I4-2 FROM FINDER I902 W TONES o CONNECTOR LINK I905 l5-2 n MULTIPLE" POINTS FOR LINKS 3-!4 NOT SHOWN LINK l5 MULTIPLE POINT I4-l5 FROM FINDER TONES o CONNECTOR LINK LRC -R. B. TROUSDALE EI'AL 2,863,001

ELECTRONIC TELEPHONE SYSTEM Dec. 2, 19 58 48 Sheets-Sheet 19 Filed May 16, 1956 scl' LRC

ESR

@ cmg a PULSE GENERATOR 29 Dec. 2, 1958 Filed My 16, 1956 R'. B. TROUSDALE ETAL ELECTRONIC TELEPHONE SYSTEM FINDER CONNECTOR l5- I 48 Sheets-Sheet 2O 

